More bad news has landed at the doorstep of billionaire hedge-fund honcho Steven Cohen.

Cohen, who just had his ex-wife’s racketeering lawsuit against him revived, learned yesterday that a former employee of his $14 billion SAC Capital Advisors has become quite the government stoolie.

Jon Horvath, an analyst with SAC’s Sigma Capital unit until his arrest last year on insider-trading charges, pleaded guilty last September. The government was given until March 31 to say whether he should be sentenced.

But he has apparently been so helpful to prosecutors and the FBI probing fraud at SAC that the feds requested the sentencing be put off for six months.

A judge, it was revealed yesterday, recently granted the request.

Last month, Horvath’s former boss at Sigma Capital, Michael Steinberg, was arrested for insider trading and pleaded not guilty.

Horvath is expected to testify at the trial of his former boss. At Steinberg’s arraignment, prosecutor Antonia Apps told Judge Richard Sullivan that the government’s case against Steinberg is based “largely” on testimony from co-operators.

Horvath was working under Steinberg at Sigma when he was arrested in January 2012, along with seven others, as part of a “corrupt circle of friends.”

At his arraignment, Horvath confessed to receiving illegal stock tips in computer-maker Dell and graphics firm Nvidia and then passing them on “to the portfolio manager I worked for.”

Of the six people arrested with Horvath, including key portfolio managers at hedge funds Level Global and Diamondback Capital, four have pleaded guilty and two have been convicted at trial.

Cohen, who has not been accused of any wrongdoing, agreed recently to shell out a record $616 million to put two civil insider-trading probes by the Securities and Exchange Commission behind the firm.

A judge Tuesday conditionally approved the larger, $602 million settlement — tied to trades in two drug companies — despite earlier reservations about language in the deal that allows SAC to not admit wrongdoing.